Lathe attachment



(No Modem l 2 sheets-sheet 2. W. FRASI'ER. LA'THE ATTACHMENT,-

5 No. 499;289. P' ente%June"13,1893.

l ashort distance from the center ofthe blank,

' UNITED i STATESv PATENT OFFICE.

wARREN ERASIER, 0E LYNN, r/IASsAcHUsETTS.A l

`LATH E ATTAGHM ENT.

SPECIFICATION forming part of Letters Patent 1vo.499,2s9, aai-.ed Junei, 1893.

- Application filed November 12, 1892. Serial No. 451,839. (No model.)

To all whom it may con/cern,.-

Be it known that I, WARREN FRASIER, a citizen of the United States, residing Vat the city of Lynn, in the county of Essex and State of Massachusetts, have invented a new and 'My invention is particularly adapted for turning pearl buttons, wherein it is necessary thatthe tool should start to cut the blank at and, as it cuts intothe blank, to be moved toward the center of the same until, when n' ished, it stands in line with the center of the button. y

In the drawings, forming part of this specification, Figure l is a front elevation, partly in section of my attachment, showing it in connection with the live spindle of a lathe. Fig. 2 is a side elevation of the same. Fig. 3 is a Section of laloutton, with the cutter shown in its relative position thereto. Fig. 4 is a diagram view, illustrating a button with the relative position taken by the cutter with reference thereto. Y

Similar letters refer to si milar parts th roughout the several views.

In the drawings (Fig. 1,) the button a is shown in section held by the spring jaws of the work-holder or chuck b. Said chuck is rotated by the live spindle c of an ordinary speed lathe. The tool d is held in a slot e in the tool holder f by the set screw g, and may be adjusted by the adjusting screw 7c'. The

A tool holder fis pivoted at j, j, to a frame z',

said frame being bolted to the bed-plate of the lathe, or to the bench upon which the lathe rests. The tool holder is thrown forward toward the work by a cam or eccentric lc, said cam being fastened to the shaft Z, and having bearings at m, fm, in the frame t. To the may be adjusted up or down in the frame i, thus governing the extent to which the tool V,can be fed into the work, by limiting the n10- tion of the handle n, and hencev of the toolholder f.

The point of the cutting edge of the tool d may be raised or lowered by the adjusting screw yh, orby the adjusting screws agr; said screws being tapped into the frameaand having a'bearin g against the bed 'of the lathe,

lit is evident that, by adjusting them, the

frame t', and hence the tool may be raisedlor lowered as may be desired.

In Fig. l, I have illustrated, by dotted lines,

the thickness of the button blank before it is turned o. vvThe cutting edge'of the cut- -ter moves on the line of the dotted 'circle-inthe saine view. It will thus be seen that the cutter engages* the blank at a point a short distance from the center, and ends-at the center'or axial line of the same. This is still further illustrated by the end view diagram, g.

Fig. 4.-. A

In Fig. 3,I have shownasection of the button with the cutter in its proper relation thereto; it will be-seen that the cutting edge projectsslightly beyond the center or axial line of the button.

Having thus described my invention, what cam lo, shaft l, and lever n; substantially as described, for the purposes specified.

3. In a lathe attachment, the combination of the frame t', tool support f, pivoted thereon, and adapted to be oscillated in a plane TOO parallel to the axial line of the lathe-spindle,

cam lo, shaft Z, Springs o, o, lever n, and adj ustable stop p; 'Substantially as described, for the purposes specified.

WARREN FRASIER.

Witnesses:

CHARLES E. JAMES, CHARLES W. JAMES. 

